drivers/media/video/tda8290.c

   1 /*
   2  *
   3  * i2c tv tuner chip device driver
   4  * controls the philips tda8290+75 tuner chip combo.
   5  */
   6 #include <linux/i2c.h>
   7 #include <linux/videodev.h>
   8 #include <linux/delay.h>
   9 #include <media/tuner.h>
  10
  11 #define I2C_ADDR_TDA8290        0x4b
  12 #define I2C_ADDR_TDA8275        0x61
  13
  14 /* ---------------------------------------------------------------------- */
  15
  16 struct freq_entry {
  17         u16     freq;
  18         u8      value;
  19 };
  20
  21 static struct freq_entry band_table[] = {
  22         { 0x2DF4, 0x1C },
  23         { 0x2574, 0x14 },
  24         { 0x22B4, 0x0C },
  25         { 0x20D4, 0x0B },
  26         { 0x1E74, 0x3B },
  27         { 0x1C34, 0x33 },
  28         { 0x16F4, 0x5B },
  29         { 0x1454, 0x53 },
  30         { 0x12D4, 0x52 },
  31         { 0x1034, 0x4A },
  32         { 0x0EE4, 0x7A },
  33         { 0x0D34, 0x72 },
  34         { 0x0B54, 0x9A },
  35         { 0x0914, 0x91 },
  36         { 0x07F4, 0x89 },
  37         { 0x0774, 0xB9 },
  38         { 0x067B, 0xB1 },
  39         { 0x0634, 0xD9 },
  40         { 0x05A4, 0xD8 },       // FM radio
  41         { 0x0494, 0xD0 },
  42         { 0x03BC, 0xC8 },
  43         { 0x0394, 0xF8 },       // 57250000 Hz
  44         { 0x0000, 0xF0 },       // 0
  45 };
  46
  47 static struct freq_entry div_table[] = {
  48         { 0x1C34, 3 },
  49         { 0x0D34, 2 },
  50         { 0x067B, 1 },
  51         { 0x0000, 0 },
  52 };
  53
  54 static struct freq_entry agc_table[] = {
  55         { 0x22B4, 0x8F },
  56         { 0x0B54, 0x9F },
  57         { 0x09A4, 0x8F },
  58         { 0x0554, 0x9F },
  59         { 0x0000, 0xBF },
  60 };
  61
  62 static __u8 get_freq_entry( struct freq_entry* table, __u16 freq)
  63 {
  64         while(table->freq && table->freq > freq)
  65                 table++;
  66         return table->value;
  67 }
  68
  69 /* ---------------------------------------------------------------------- */
  70
  71 static unsigned char i2c_enable_bridge[2] =     { 0x21, 0xC0 };
  72 static unsigned char i2c_disable_bridge[2] =    { 0x21, 0x80 };
  73 static unsigned char i2c_init_tda8275[14] =     { 0x00, 0x00, 0x00, 0x00,
  74                                                   0xfC, 0x04, 0xA3, 0x3F,
  75                                                   0x2A, 0x04, 0xFF, 0x00,
  76                                                   0x00, 0x40 };
  77 static unsigned char i2c_set_VS[2] =            { 0x30, 0x6F };
  78 static unsigned char i2c_set_GP01_CF[2] =       { 0x20, 0x0B };
  79 static unsigned char i2c_tda8290_reset[2] =     { 0x00, 0x00 };
  80 static unsigned char i2c_tda8290_standby[2] =   { 0x00, 0x02 };
  81 static unsigned char i2c_gainset_off[2] =       { 0x28, 0x14 };
  82 static unsigned char i2c_gainset_on[2] =        { 0x28, 0x54 };
  83 static unsigned char i2c_agc3_00[2] =           { 0x80, 0x00 };
  84 static unsigned char i2c_agc2_BF[2] =           { 0x60, 0xBF };
  85 static unsigned char i2c_cb1_D0[2] =            { 0x30, 0xD0 };
  86 static unsigned char i2c_cb1_D2[2] =            { 0x30, 0xD2 };
  87 static unsigned char i2c_cb1_56[2] =            { 0x30, 0x56 };
  88 static unsigned char i2c_cb1_52[2] =            { 0x30, 0x52 };
  89 static unsigned char i2c_cb1_50[2] =            { 0x30, 0x50 };
  90 static unsigned char i2c_agc2_7F[2] =           { 0x60, 0x7F };
  91 static unsigned char i2c_agc3_08[2] =           { 0x80, 0x08 };
  92
  93 /* FIXME: European PAL/SECAM should select 9MHz Lowpass Filter, while
  94    NTSC/M and PAL/M should be using 7MHz filter, by selecting CB3 */
  95 static unsigned char i2c_cb3_9MHz[2] =          { 0xc0, 0x39 };
  96 static unsigned char i2c_cb3_7MHz[2] =          { 0xc0, 0x3B };
  97
  98 static struct i2c_msg i2c_msg_init[] = {
  99         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_init_tda8275), i2c_init_tda8275 },
 100         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
 101         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_VS), i2c_set_VS },
 102         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_GP01_CF), i2c_set_GP01_CF },
 103 };
 104
 105 static struct i2c_msg i2c_msg_prolog[] = {
 106 //      { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_easy_mode), i2c_easy_mode },
 107         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_off), i2c_gainset_off },
 108         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_reset), i2c_tda8290_reset },
 109         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
 110 };
 111
 112 static struct i2c_msg i2c_msg_config[] = {
 113 //      { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_set_freq), i2c_set_freq },
 114         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_00), i2c_agc3_00 },
 115         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_BF), i2c_agc2_BF },
 116         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D2), i2c_cb1_D2 },
 117         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_56), i2c_cb1_56 },
 118         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_52), i2c_cb1_52 },
 119 };
 120
 121 static struct i2c_msg i2c_msg_epilog[] = {
 122         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_50), i2c_cb1_50 },
 123         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_7F), i2c_agc2_7F },
 124         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_08), i2c_agc3_08 },
 125         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
 126         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_on), i2c_gainset_on },
 127 };
 128
 129 static struct i2c_msg i2c_msg_standby[] = {
 130         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
 131         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D0), i2c_cb1_D0 },
 132         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
 133         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_standby), i2c_tda8290_standby },
 134 };
 135
 136 static int tda8290_tune(struct i2c_client *c)
 137 {
 138         struct tuner *t = i2c_get_clientdata(c);
 139         struct i2c_msg easy_mode =
 140                 { I2C_ADDR_TDA8290, 0, 2, t->i2c_easy_mode };
 141         struct i2c_msg set_freq =
 142                 { I2C_ADDR_TDA8275, 0, 8, t->i2c_set_freq  };
 143
 144         i2c_transfer(c->adapter, &easy_mode,      1);
 145         i2c_transfer(c->adapter, i2c_msg_prolog, ARRAY_SIZE(i2c_msg_prolog));
 146
 147         i2c_transfer(c->adapter, &set_freq,       1);
 148         i2c_transfer(c->adapter, i2c_msg_config, ARRAY_SIZE(i2c_msg_config));
 149
 150         msleep(550);
 151         i2c_transfer(c->adapter, i2c_msg_epilog, ARRAY_SIZE(i2c_msg_epilog));
 152         return 0;
 153 }
 154
 155 static void set_frequency(struct tuner *t, u16 ifc, unsigned int freq)
 156 {
 157         u32 N;
 158
 159         if (t->mode == V4L2_TUNER_RADIO)
 160                 freq = freq / 1000;
 161
 162         N = (((freq<<3)+ifc)&0x3fffc);
 163
 164         N = N >> get_freq_entry(div_table, freq);
 165         t->i2c_set_freq[0] = 0;
 166         t->i2c_set_freq[1] = (unsigned char)(N>>8);
 167         t->i2c_set_freq[2] = (unsigned char) N;
 168         t->i2c_set_freq[3] = 0x40;
 169         t->i2c_set_freq[4] = 0x52;
 170         t->i2c_set_freq[5] = get_freq_entry(band_table, freq);
 171         t->i2c_set_freq[6] = get_freq_entry(agc_table,  freq);
 172         t->i2c_set_freq[7] = 0x8f;
 173 }
 174
 175 #define V4L2_STD_MN     (V4L2_STD_PAL_M|V4L2_STD_PAL_N|V4L2_STD_PAL_Nc|V4L2_STD_NTSC)
 176 #define V4L2_STD_B      (V4L2_STD_PAL_B|V4L2_STD_PAL_B1|V4L2_STD_SECAM_B)
 177 #define V4L2_STD_GH     (V4L2_STD_PAL_G|V4L2_STD_PAL_H|V4L2_STD_SECAM_G|V4L2_STD_SECAM_H)
 178 #define V4L2_STD_DK     (V4L2_STD_PAL_DK|V4L2_STD_SECAM_DK)
 179
 180 static void set_audio(struct tuner *t)
 181 {
 182         t->i2c_easy_mode[0] = 0x01;
 183
 184         if (t->std & V4L2_STD_MN) {
 185                 t->sgIF = 736;
 186                 t->i2c_easy_mode[1] = 0x01;
 187         } else if (t->std & V4L2_STD_B) {
 188                 t->sgIF = 864;
 189                 t->i2c_easy_mode[1] = 0x02;
 190         } else if (t->std & V4L2_STD_GH) {
 191                 t->sgIF = 992;
 192                 t->i2c_easy_mode[1] = 0x04;
 193         } else if (t->std & V4L2_STD_PAL_I) {
 194                 t->sgIF = 992;
 195                 t->i2c_easy_mode[1] = 0x08;
 196         } else if (t->std & V4L2_STD_DK) {
 197                 t->sgIF = 992;
 198                 t->i2c_easy_mode[1] = 0x10;
 199         } else if (t->std & V4L2_STD_SECAM_L) {
 200                 t->sgIF = 992;
 201                 t->i2c_easy_mode[1] = 0x20;
 202         }
 203 }
 204
 205 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
 206 {
 207         struct tuner *t = i2c_get_clientdata(c);
 208
 209         set_audio(t);
 210         set_frequency(t, t->sgIF, freq);
 211         tda8290_tune(c);
 212 }
 213
 214 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
 215 {
 216         struct tuner *t = i2c_get_clientdata(c);
 217         set_frequency(t, 704, freq);
 218         tda8290_tune(c);
 219 }
 220
 221 static int has_signal(struct i2c_client *c)
 222 {
 223         unsigned char i2c_get_afc[1] = { 0x1B };
 224         unsigned char afc = 0;
 225
 226         i2c_master_send(c, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 227         i2c_master_recv(c, &afc, 1);
 228         return (afc & 0x80)? 65535:0;
 229 }
 230
 231 static void standby(struct i2c_client *c)
 232 {
 233         i2c_transfer(c->adapter, i2c_msg_standby, ARRAY_SIZE(i2c_msg_standby));
 234 }
 235
 236 int tda8290_init(struct i2c_client *c)
 237 {
 238         struct tuner *t = i2c_get_clientdata(c);
 239
 240         strlcpy(c->name, "tda8290+75", sizeof(c->name));
 241         tuner_info("tuner: type set to %s\n", c->name);
 242         t->tv_freq    = set_tv_freq;
 243         t->radio_freq = set_radio_freq;
 244         t->has_signal = has_signal;
 245         t->standby = standby;
 246
 247         i2c_master_send(c, i2c_enable_bridge, ARRAY_SIZE(i2c_enable_bridge));
 248         i2c_transfer(c->adapter, i2c_msg_init, ARRAY_SIZE(i2c_msg_init));
 249         return 0;
 250 }
 251
 252 /*
 253  * Overrides for Emacs so that we follow Linus's tabbing style.
 254  * ---------------------------------------------------------------------------
 255  * Local variables:
 256  * c-basic-offset: 8
 257  * End:
 258  */